MECHANICAL PROJECTS LIST-Solar optimal power generation for electrical appliances 1


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MECHANICAL PROJECTS LIST-Solar optimal power generation for electrical appliances 1

  1. 1. Solar Optimal Power Generation for Home AppliancesRenewable energy SourcesRenewable energy sources can be replenished in a short period oftime. The five renewable sources used most often are: o biomass o hydropower o geothermal o wind o solar 89 RANGARAJAPURAM MAIN ROAD,KODAMBAKKAM,CHENNAI-24 PL VISIT,mobile:098402 34766
  2. 2. IntroductionWeve used the Sun for drying clothes and food forthousands of years, but only recently have we been ableto use it for generating power.The Sun is 150 million kilometres away, and amazinglypowerful.Just the tiny fraction of the Suns energy that hits theEarth (around a hundredth of a millionth of a percent) isenough to meet all our power needs many times over.In fact, every minute, enough energy arrives at the Earthto meet our demands for a whole year - if only we couldharness it properly. There are three main ways that we use the Suns energy:- 1Solar Cells (really called "photovoltaic" or"photoelectric" cells) that convert light directly intoelectricity.In a sunny climate, you can get enough power torun a 100W light bulb from just one square metreof solar panel. This was originally developed in order to provide electricity for satellites, but these days many of us own calculators powered by solar cells. 89 RANGARAJAPURAM MAIN ROAD,KODAMBAKKAM,CHENNAI-24 PL VISIT,mobile:098402 34766
  3. 3. 2Solar water heating,where heat from the Sun is usedto heat water in glass panels onyour roof.This means you dont need touse so much gas or electricity toheat your water at home. Water is pumped through pipes in the panel. The pipes are painted black, so they get hot when the Sun shines on them. This helps out your central heating system, and cuts your fuel bills. However, in the UK you must remember to drain the water out to stop the panels freezing in the winter. Solar heating is worthwhile in places like California and Australia, where you get lots of sunshine. 3Solar Furnaces use a huge array of mirrors to concentrate the Suns energy intoa small space and produce very high temperatures. 89 RANGARAJAPURAM MAIN ROAD,KODAMBAKKAM,CHENNAI-24 PL VISIT,mobile:098402 34766
  4. 4. Advantages • Solar energy is free - it needs no fuel and produces no waste or pollution. • In sunny countries, solar power can be used where there is no easy way to get electricity to a remote place. • Handy for low-power uses such as solar powered garden lights and battery chargersDisadvantages • Doesnt work at night. • Very expensive to build solar power stations. Solar cells cost a great deal compared to the amount of electricity theyll produce in their lifetime. • Can be unreliable unless youre in a very sunny climate. In the United Kingdom, solar power isnt much use except for low-power applications, as you need a very large area of solar panels to get a decent amount of power. However, for these applications its definitely worthwhile.Proposed Idea:Tracking Sun’s Path:Normally solar cells are placed in a ground in one direction only. But sun movesin a elliptical path. So only few hours the sunlight falls into the cell. During therest of the hours the percentage of Sunlight, which falls into the cell, is very less.Which results in less amount of energy generation.To overcome this problem we can construct a model where we can place thesolar cell in it and which can move in elliptical path .To track the sunlight. This isachieved with the help of light intensity sensors. The sensors are fixed into themodel in an elliptical path. So depending on the sunlight the sensors outputdiffers. So according position the solar panel, which results in good efficiency.(i.e.).the solar cell can produce energy by tracking the sunlight with the help ofsensors and mechanical model. The Movement is controlled by a PICMicrocontroller. Also we have an LCD Display to Show the current Position. 89 RANGARAJAPURAM MAIN ROAD,KODAMBAKKAM,CHENNAI-24 PL VISIT,mobile:098402 34766
  5. 5. The delivered power of a Solar Panel is used to charge a DC Battery. Whichis finally provided to the run a small fan or to provide dc light source. TheBattery will be keep on charging using the solar panel.Mechanical arrangement: Motor Solar cell Sensors-2 Sensors-3 Sensors-1Block diagram: Light 89 RANGARAJAPURAM MAIN ROAD,KODAMBAKKAM,CHENNAI-24 intensity PL VISIT,mobile:098402 34766 sensors LCD Display
  6. 6. Potential Divider PIC Microcontroller Power PIC 16F877 Supply Opto Opto Opto Opto Coupler Coupler Coupler Coupler Pre Pre Pre Pre Driver Driver Driver Driver Signal Power Power Power Power Conditioner Driver Driver Driver Driver Circuit Solar Cell Stepper Motor Mechanical Model Fan or Light Batttery operated by DC Source89 RANGARAJAPURAM MAIN ROAD,KODAMBAKKAM,CHENNAI-24 PL VISIT,mobile:098402 34766